This program is very simple and does only one thing, which is to add ringtones to your iPhone (and remove the same), which you have, without having to purchase specified ringtones from Apple and/or the iTunes store. This program does not hack into your iPhone (no "jailbreaking") and so there is no danger to your iPhone, of becoming bricked, like many others had happen to them from unlocking and/or jailbreaking. This program does one thing, puts the ringtones in the right place to be used by the iPhone and doesn't do anything else. For doing exactly that, you couldn't ask for a better program.